Motor for street-cars



(No Model.) 2 Sheets-Sheet 1.

W. S. SALISBURY. MOTOR E 'ORSTRBET CARS.

No. 408,754. Patented Aug. 1.3, 1889..4

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MOTOR POR STREET GARS. I No. 408,754. f Patented-Aug. 13, 1889.

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2O connecting 'the same with the axle, whereby .To all whom, it mayconcern:

` UNITED STATES wILBER s. sALIsBUEY,

PATENT OFFICE.

or crudi-ico, ILLINOIS.

MOTOR FOR STREET-CARS.v

SPECIFICATION forming part of Letters Patent No. 408,754, dated August13, 1889.

Application filed March 1, 1889. Serial No. 301,710. (No model.)

Be it known that I, WILBER S. SALISBURY, citizen of the United States,and a'resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Motors forStreet-Cars, described and claimed in the following speciflcatiom Thisinvention relates to improvements in electric motors for street-cars,but is especially intended as an improvement upon the invention setforth in United States Letters Patent No.394a015, granted me December 4,1888, in which was shown a frame balanced upon the car-axle andconstituting a support for electric motors geared with and driving theaxle.

The prime object of this invent-ion is to provide a new and novelarrangement of motors upon the balanced frame and the gears motors ofgreater speed and power may be employed without detracting from thecompactness of the mechanism or destroying the balance of the frame uponthe axle.

Another object is to have the frame of such construction that the motorswillV have a yielding, support vand movement independent of the frameandits yielding connection with the car-superstructure, whereby the powerof the motors will more nearly simulate the action of draft-animals thanwith the yielding connection alone and the strain of starting andstopping the car will be better distributed. Y

A further object is to provide an anti-friction bearing for the frameupon the axle of peculiar construction, which will not be affected bythe end thrusts of the frame,

v'whereby the wear of the latter upon its bearing will be reduced to theminimum.

These objects are obtained by the devices villustrated in theaccompanying drawings,

in which*- Figure 1 represents a half-plan-and halfsectional view of aportion of a car-axle, showing a frame and motors applied theretoembodying my invention; Fig. 2, a side elevation thereof, showing partsof the casingframe broken away; Fig.' 3, an enlarged horizontal sectionthrough the casing-frame; Fig.

4, an enlarged section on the line 5 5 of Fig. 3, more clearly showingthe arrangement of the anti-friction devices; Fig. 5, one of thebearing-plates or segments of the anti-friction device, and Fig. 6 oneof the anti-friction cylinders.

Similar letters of reference indicate the same parts in the severaligures of the drawings. p

Referring by letter to the accompanying drawings, A indicates the axle,and B a frame composed of two sections bolted together and journaledupon the hub B of a large gear- Wheel C, for which the frame constitutesa casing or covering. Between this frame and the hubs ofthe gear-Wheel,which is elongated or extended at each side of the wheel, is ananti-friction bearing, consisting of a series of segmentalbearing-plates D, which, when inserted into the hub of the frame, form aring, each of said sections or plates being held in position byscrew-bolts E, working through the frame-hub and furnishing a readymeans of adjustment for the plates to take up the wearA on thebearing-surfaces thereof or of the anti-friction rollers F, two or moreof which work between each plate and the hub of the gear-wheel. Each ofthese rollers is provided with a contracted portion G at the center oflength thereof adapted to fit in corresponding recesses H in the innerfaces o'f the bearing-plates, the said recesses being of just sufficientdiameter to permit the free rotation of the rollers therein, so that themain bodies of the rollers lie at each side of the saidbearing-plates,land are thus prevented from having any endwise movementupon the hub of the gear-wheel, which latter, as before described, iskeyed upon the axle. The frame or casing B is in turn prevented fromendwise movement by means of removable sectional end caps or plates I,bolted to the hub thereof, which cover the spaces in whichtheanti-friction rollers work and bear against the hub of the gear-wheelat each end in such manner as to eifectually prevent an endwise movementof the frame independent of the gear-wheel.

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rllhe bearing-surfaces of the gear-wheel hub t `are protected byhardened steel sleeves J,

' binding of the parts, also enables the ready compensation for wearbetween the parts, the removal of worn and substitution of new partswithout interference with the rest, and withal furnishes a durable andcommercial structure capable of being partially or wholly dctached fromthe axle with a minimum expenditure of time and labor. This frame, as inthe said prior patent, is balanced on the axle and limited and opposedin its oscillations by powerful coiled springs K, attached at theirends, respectively, to the frame at the center above the gear-wheel andextending in opposite directions therefrom, with their opposite endsattached to the ear-frame or superstructure. These springs aresupplemented by supporting-springs L, attached at their ends,respectively, to the frame at each side of the axle, their opposite endbeing connected by a guy-rope M, working over pulleys N, secured to thecar-superstructure, which springs serve in a measure to relieve thecar-r axle of the direct weight of the'frame or casing and the partssupported thereby, while permitting a free oscillation of frame on theaxle. Instead, however, of the electric motors O being mounted directlyupon the frame, as in. my aforesaid patent, they are supported uponsupplemental frames P, one at each side of the axle, and having apivotal or hingelike connection with said frame through the. medium ofthe bearing-eyes Q thereof, through which work counter-shafts R, looselyjournaled in said frame and having gear-wheels S T mounted on each endthereof, both of the former meshing with the axle gear-wheel C, and thelatter meshing, respectively, with the gear-wheels U on thearmature-shafts V of the electric motors. Suchaconstruetion permits of avertical movement of the supplemental frames, carrying with them theelectric motors independent of the main supporting or casing frame, thismovement, however, being in a curved line struck on the are of a circlefrom the axes of the counter-shafts R, so that the operation of thedriving-gears will be in no wise aifected thereby. The weight of thesesupplemental frames and the parts carried thereby is indirectlysupported upon the casing-frame by coil-sprin gs a b, sleeved upon barsc, depending from the supplemental frames, between which and brackets d,screwed to the main frame, the springs a are confined, while the springsI) are confined between the under side of said brackets andscrew-washers or equivalent devices on the lower ends of the bars c, allof which springs yieldingly oppose a movement of the supplementalindependent of the main frames, but gat the same time permit sufficientmovement to compensate for any slight irregularity or difference in thespeed of the motors and serve to render the action of the motors morenearly like that of draft-animals.

The construction of the motors to be cmployed in connection with thisinvention is immaterial, because if the opposing motors are alike theywill necessarily produce an cxact balance of the frame upon the axle,and the only feature to be observed is that the field-magnets, spools,and armatures of the motors are supported upon the supplemental frames.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1. In a motor for street-cars, the combination, with the axle and agear-wheel mounted thereon, of a easing-frame journaled on said axle, asupplemental frame yieldingly supported upon said easing-frame, anelectric motor mounted on said supplemental frame, and a gear-connectionbetween said motor and the axle gear-wheel, substantially as described.

2. In a motor for street-cars, the combination, with the axle and agear-wheel mounted thereon, of abalanced casing-frame journaled on saidaxle, a pair of supplemental frames pivotally connected with saidcasing-frame at each side of the axle, a yielding connection betweensaid frames, electric motors mounted on said frames, and gear-connectionbetween both of said motors and the axle gear-wheel, substantially asdescribed.

3. In a motor for street-cars, the combination,with the axle and agear-wheel mounted thereon, of a easing-frame j ournaled upon the axle,a counter-shaft j ournaled in said frame, a supplemental frame journaledupon said shaft, an electric motor mounted upon said frame, agear-connection between said motor and shaft and between said shaft andthe axle gearavheel, and a yielding connection between said supplementaland casing frames, substantially as described.

4. In a motor for street-cars, the combination, with the axle and agear-wheel mounted thereon, of a casing-frame journaled upon the axle, acounter-shaft journaled in said frame, a supplemental frame journaledupon said shaft, an electric motor mounted upon said frame, agear-connection between said shaft and motor and between said shaft andthe axle gear-wheel, a bracket projecting from the casing-frame, adepending bar from the supplemental frame working through said bracket,and coiled springs sleeved on said bar and confined between thesupplemental frame and said bracket on the upper side thereof andbetween a washer on the end of said bar and the bracket on the underside thereof, substantially as described.

5. In a motor for street-cars, the combination, with the axle, agear-wheel mounted thereon, a casing-frame balanced upon the axle, andyielding cushions connecting said frame with the car-superstructure anddirectly opposing the oscillation of said casing IOO ITO

on the axle, of supplemental frames yield.-v

ingly supported'upon said easing-frame, electric motors mounted 011 saidsupplemental frames, gear-connections between said motors and the axlegear-wheel, and a yielding connection between said supplemental andcasing frames, substantially as described.

6. In a motor for street-cars, the combination, with the axle, agear-wheel mounted thereon, a casing-frame journaled upon said axle, andcoil-springs attached at their ends,

respectively, to said frame and the car-super-v structure, extendingV inlopposite directions from said frame, of supplemental frames piv-Votally connected with the casing-frame, electric motors mounted on saidsupplemental frames, gear-connections between said motors and the axlegear-wheel, and yielding connection between said supplemental and casingframes, substantially as described.

7. In a motor for street-cars, the combina-l tion, With the axle, agear-Wheel mounted thereon having elongated hubs, and a casing framebalanced on said axle constituting a support for electric motorsoperating said wheel, of anti-friction rollers bearing on said hubs,having contracted portions, and a bearin g-ring provided with recessesfor reception of said contracted portions of the rollers in terposedbetween said rollers and the bearing-walls of the casing-frame,substantially as described.

8. In a motor for street-cars, the combinaing a support for electricmotors operating said wheel, of anti-friction rollers, removablebearing-sleeves on the hubs of said gear- Wheel on which the rollersbear, said rollers having contracted central portions, and adjustablesegmental bearing-plates provided with recesses on the inner faceslthereof in which said contracted portions of the rollers bear, saidplates being interposed between the rollers and the bearing-walls of thecasing-frame, substantially as described.

-This speciiication signed and witnessed this 21st day of February,1889.

WILBER S. SALISBURY.

Witnesses:

ALBERT H. ADAMS, FRANK S. BLANCHARD.

